ASSEMBLY FOR FATIGUE TESTING OF SPECIMENS OF MATERIALS Russian patent published in 1995 - IPC

FIELD: test equipment. SUBSTANCE: assembly has bases, coaxial gripping devices of the specimen, loading contrivance made in form of slider-crank mechanism mounted onto the base, adjustable length connecting rod connected with slider of slider-crank mechanism which is mounted onto the base of guiding cylinder where the slider is disposed, and power spring disposed in guiding cylinder. One end of the spring is in contact with the slider and the other one is connected with some gripping device. There is a drive connected with slider-crank mechanism. The piston is disposed in guiding cylinder. One end of the piston is fastened to the gripping device and the other one is in contact with power spring. Assembly is provided with two additional loading contrivances; each contrivance is made in form of slider-crank mechanism connected with drive; guide of the slider is fixed to the base. Base of the slider is connected with the base of connecting rod which has adjustable length. Both are fixed to bases of the units provided with flexible link. One end is connected with slider, of the power spring which is connected with the other end of the flexible link and connected with spring of the lever which has end attached to the gripping device onto which the piston is attached. Cranks of the mechanisms of loading contrivances are coaxial. Levers are disposed at different sides of the gripping devices. The other gripping device is fixed to the base. EFFECT: improved reliability of operation. 3 dwg